[Opinions] Re: Using a less common nickname
I hadn't heard Gretchen for Margaret, nor Nancy for Anne (though I do know Nan was/is used.
The others, I did know about.
I think it's acceptable. someone might ask, now and then, why such-and-such a nick-name, but I don't think it would be a big deal.
Some of my mother's family had unlikely nick-names. There must have been a reason, originally, for them, but it got lost, in the mists of time!
For example,my Uncle Edgar..nn "Tee Tee."My Aunt Elsie..nn"Pat".